@misc{diez_thermally_rearranged_2018, 
author={Diez, B.,Cuadrado, P.,Marcos-Fernandez, M.,de la Campa, J.G.,Tena, A.,Pradanos, P.,Palacio, L.,Lee, Y.M.,Alvarez, C.,Lotano, A.E.,Hernandez, A.},
title={Thermally rearranged polybenzoxazoles made from poly(ortho-hydroxyamide)s. Characterization and evaluation as gas separation membranes},
year={2018},
howpublished = {journal article},
doi = {https://doi.org/10.1016/j.reactfunctpolym.2018.03.013},
abstract = {Two series of aromatic poly(ortho-hydroxyamide)s (poly(o-hydroxyamide)s, HPAs) were prepared by reaction of two diamines, 2,2-bis(3-amino-4-hydroxyphenyl) propane (APA) and 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (APAF), with four aromatic diacid chlorides; terephthaloyl dichloride (TPC), isophthaloyl dichloride (IPC), 2,2-bis[4-chlorocarbonylphenyl)hexafluoropropane (6FC) and 4,4′-sulfonyldibenzoyl dichloride (DBSC). Amorphous HPAs with high molecular weights (inherent viscosities higher than 0.5 dL/g) and relatively high glass transition temperatures (220–280 °C) were obtained. Dense membranes of HPAs were able to undergo a thermal rearrangement (TR) process to polybenzoxazoles (β-TR-PBOs) heating at moderate temperatures (between 250 and 375 °C), and their complete conversion was reached at a temperature below 375 °C, depending on the o-hydroxy diamine moiety, APA and APAF. The β-TR-PBOs films derived from APAF showed a higher thermal stability and higher Tg than those from APA. Gas separation properties of TR-PBOs membranes were superior to those of their poly(o-hydroxyamide) precursors, particularly for the following gas pairs: O2/N2, CO2/CH4, He/CH4 and He/CO2.},
note = {Online available at: \url{https://doi.org/10.1016/j.reactfunctpolym.2018.03.013} (DOI). Diez, B.; Cuadrado, P.; Marcos-Fernandez, M.; de la Campa, J.; Tena, A.; Pradanos, P.; Palacio, L.; Lee, Y.; Alvarez, C.; Lotano, A.; Hernandez, A.: Thermally rearranged polybenzoxazoles made from poly(ortho-hydroxyamide)s. Characterization and evaluation as gas separation membranes. Reactive and Functional Polymers. 2018. vol. 127, 38-47. DOI: 10.1016/j.reactfunctpolym.2018.03.013}}